Siemens SIPROTEC 6MD665, Руководство пользователя

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2.4 Measured value processing
39
6MD665 Manual
C53000-G1876-C103-3
2.4.6.3 Settings
2.4.6.4 Information
2.4.7 Measurement 3phase 1.packet
This packet serves to perform a three-phase measurement (current and voltage). The
measuring results of the phase currents, phase voltages, phase-to-phase voltages,
zero sequence current and zero sequence voltage are RMS values of the correspond-
ing fundamental compound.
2.4.7.1 Description
The following phase currents are applied at the current inputs of the measuring trans-
ducer: I
L1
, I
L2
and I
L3
, as were the voltages U
L1
, U
L2
and U
L3
.
The r.m.s. values of the phase currents calculated from these six input signals, phase
voltages, phase-to-phase voltages, zero sequence current, phase voltages,
phase-to-phase voltages, zero sequence current, zero sequence voltage, active
power, reactive power, apparent power, cos
Φ
, sin
Φ
and
Φ
the linked sizes and
frequency calculated from the voltage U
L1
(see Information overview table) are
applied at the output of the measuring transducer.
The frequency is determined from the applied phase voltage U
L1
. If the secondary
input voltage on the device falls below 10 V
eff
, the frequency is determined from the
phase voltage U
L2
or U
L3
. If all three voltages are too low, the rated frequency is used
as frequency. In this case, the combined variables and the frequency itself are marked
invalid. The phase-to-phase voltages and the zero variables start to fluctuate depend-
ing on the deviation from the rated frequency. The overflow occurs when the second-
Addr. Parameter Setting Options Default Setting Description
0 SecVoltgNomVal 0.00 .. 200.00 V; <
> 0 100.00 V Secondary Voltage Nominal
Value
0 SecCurrNomVal 0.00 .. 5.00 A; < >
0 1.00 A Secondary Current Nominal
Value
No. Message Type of Information Description
- 1P1Input_U MK 1P1 Voltage Input U
- 1P1Input_I MK 1P1 Current Input I
- 1P1_U MW 1P1 Voltage U
- 1P1_I MW 1P1 Current I
- 1P1_P MW 1P1 Active Power P
- 1P1_Q MW 1P1 Reactive Power Q
- 1P1_S MW 1P1 Apparent Power S
- 1P1_
ϕ
MW 1P1 Phase Angle Phi
- 1P1_cos
ϕ
MW 1P1 Active Power Factor Cosine Phi
- 1P1_sin
ϕ
MW 1P1 Reactive Power Factor Sine Phi
- 1P1_f MW 1P1 Frequency of U